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Description: Long but simple algebraic transformations are applied to show that V , the Wallis formula for π , can be expressed in terms of A , the Stirling's approximation formula for the factorial, up to a constant factor. This will allow (in a later theorem) to determine the right constant factor to be put into the A , in order to get the exact Stirling's formula. (Contributed by Glauco Siliprandi, 29-Jun-2017)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | stirlinglem3.1 | |- A = ( n e. NN |-> ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) |
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| stirlinglem3.2 | |- D = ( n e. NN |-> ( A ` ( 2 x. n ) ) ) |
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| stirlinglem3.3 | |- E = ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) |
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| stirlinglem3.4 | |- V = ( n e. NN |-> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ! ` n ) ^ 4 ) ) / ( ( ! ` ( 2 x. n ) ) ^ 2 ) ) / ( ( 2 x. n ) + 1 ) ) ) |
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| Assertion | stirlinglem3 | |- V = ( n e. NN |-> ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | stirlinglem3.1 | |- A = ( n e. NN |-> ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) |
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| 2 | stirlinglem3.2 | |- D = ( n e. NN |-> ( A ` ( 2 x. n ) ) ) |
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| 3 | stirlinglem3.3 | |- E = ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) |
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| 4 | stirlinglem3.4 | |- V = ( n e. NN |-> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ! ` n ) ^ 4 ) ) / ( ( ! ` ( 2 x. n ) ) ^ 2 ) ) / ( ( 2 x. n ) + 1 ) ) ) |
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| 5 | nnnn0 | |- ( n e. NN -> n e. NN0 ) |
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| 6 | faccl | |- ( n e. NN0 -> ( ! ` n ) e. NN ) |
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| 7 | nncn | |- ( ( ! ` n ) e. NN -> ( ! ` n ) e. CC ) |
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| 8 | 5 6 7 | 3syl | |- ( n e. NN -> ( ! ` n ) e. CC ) |
| 9 | 2cnd | |- ( n e. NN -> 2 e. CC ) |
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| 10 | nncn | |- ( n e. NN -> n e. CC ) |
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| 11 | 9 10 | mulcld | |- ( n e. NN -> ( 2 x. n ) e. CC ) |
| 12 | 11 | sqrtcld | |- ( n e. NN -> ( sqrt ` ( 2 x. n ) ) e. CC ) |
| 13 | ere | |- _e e. RR |
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| 14 | 13 | recni | |- _e e. CC |
| 15 | 14 | a1i | |- ( n e. NN -> _e e. CC ) |
| 16 | epos | |- 0 < _e |
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| 17 | 13 16 | gt0ne0ii | |- _e =/= 0 |
| 18 | 17 | a1i | |- ( n e. NN -> _e =/= 0 ) |
| 19 | 10 15 18 | divcld | |- ( n e. NN -> ( n / _e ) e. CC ) |
| 20 | 19 5 | expcld | |- ( n e. NN -> ( ( n / _e ) ^ n ) e. CC ) |
| 21 | 12 20 | mulcld | |- ( n e. NN -> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) e. CC ) |
| 22 | 2rp | |- 2 e. RR+ |
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| 23 | 22 | a1i | |- ( n e. NN -> 2 e. RR+ ) |
| 24 | nnrp | |- ( n e. NN -> n e. RR+ ) |
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| 25 | 23 24 | rpmulcld | |- ( n e. NN -> ( 2 x. n ) e. RR+ ) |
| 26 | 25 | sqrtgt0d | |- ( n e. NN -> 0 < ( sqrt ` ( 2 x. n ) ) ) |
| 27 | 26 | gt0ne0d | |- ( n e. NN -> ( sqrt ` ( 2 x. n ) ) =/= 0 ) |
| 28 | nnne0 | |- ( n e. NN -> n =/= 0 ) |
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| 29 | 10 15 28 18 | divne0d | |- ( n e. NN -> ( n / _e ) =/= 0 ) |
| 30 | nnz | |- ( n e. NN -> n e. ZZ ) |
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| 31 | 19 29 30 | expne0d | |- ( n e. NN -> ( ( n / _e ) ^ n ) =/= 0 ) |
| 32 | 12 20 27 31 | mulne0d | |- ( n e. NN -> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) =/= 0 ) |
| 33 | 8 21 32 | divcld | |- ( n e. NN -> ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) e. CC ) |
| 34 | 1 | fvmpt2 | |- ( ( n e. NN /\ ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) e. CC ) -> ( A ` n ) = ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) |
| 35 | 33 34 | mpdan | |- ( n e. NN -> ( A ` n ) = ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) |
| 36 | 35 | oveq1d | |- ( n e. NN -> ( ( A ` n ) ^ 4 ) = ( ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ^ 4 ) ) |
| 37 | 3 | fvmpt2 | |- ( ( n e. NN /\ ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) e. CC ) -> ( E ` n ) = ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) |
| 38 | 21 37 | mpdan | |- ( n e. NN -> ( E ` n ) = ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) |
| 39 | 38 | oveq1d | |- ( n e. NN -> ( ( E ` n ) ^ 4 ) = ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) |
| 40 | 36 39 | oveq12d | |- ( n e. NN -> ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) = ( ( ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ^ 4 ) x. ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) ) |
| 41 | 4nn0 | |- 4 e. NN0 |
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| 42 | 41 | a1i | |- ( n e. NN -> 4 e. NN0 ) |
| 43 | 8 21 32 42 | expdivd | |- ( n e. NN -> ( ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ^ 4 ) = ( ( ( ! ` n ) ^ 4 ) / ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) ) |
| 44 | 43 | oveq1d | |- ( n e. NN -> ( ( ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ^ 4 ) x. ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) = ( ( ( ( ! ` n ) ^ 4 ) / ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) x. ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) ) |
| 45 | 8 42 | expcld | |- ( n e. NN -> ( ( ! ` n ) ^ 4 ) e. CC ) |
| 46 | 21 42 | expcld | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) e. CC ) |
| 47 | 42 | nn0zd | |- ( n e. NN -> 4 e. ZZ ) |
| 48 | 21 32 47 | expne0d | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) =/= 0 ) |
| 49 | 45 46 48 | divcan1d | |- ( n e. NN -> ( ( ( ( ! ` n ) ^ 4 ) / ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) x. ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) ) = ( ( ! ` n ) ^ 4 ) ) |
| 50 | 40 44 49 | 3eqtrd | |- ( n e. NN -> ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) = ( ( ! ` n ) ^ 4 ) ) |
| 51 | 50 | eqcomd | |- ( n e. NN -> ( ( ! ` n ) ^ 4 ) = ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) |
| 52 | 51 | oveq2d | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( ( ! ` n ) ^ 4 ) ) = ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) ) |
| 53 | 2nn0 | |- 2 e. NN0 |
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| 54 | 53 | a1i | |- ( n e. NN -> 2 e. NN0 ) |
| 55 | 54 5 | nn0mulcld | |- ( n e. NN -> ( 2 x. n ) e. NN0 ) |
| 56 | faccl | |- ( ( 2 x. n ) e. NN0 -> ( ! ` ( 2 x. n ) ) e. NN ) |
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| 57 | nncn | |- ( ( ! ` ( 2 x. n ) ) e. NN -> ( ! ` ( 2 x. n ) ) e. CC ) |
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| 58 | 55 56 57 | 3syl | |- ( n e. NN -> ( ! ` ( 2 x. n ) ) e. CC ) |
| 59 | 58 | sqcld | |- ( n e. NN -> ( ( ! ` ( 2 x. n ) ) ^ 2 ) e. CC ) |
| 60 | 9 11 | mulcld | |- ( n e. NN -> ( 2 x. ( 2 x. n ) ) e. CC ) |
| 61 | 60 | sqrtcld | |- ( n e. NN -> ( sqrt ` ( 2 x. ( 2 x. n ) ) ) e. CC ) |
| 62 | 11 15 18 | divcld | |- ( n e. NN -> ( ( 2 x. n ) / _e ) e. CC ) |
| 63 | 62 55 | expcld | |- ( n e. NN -> ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) e. CC ) |
| 64 | 61 63 | mulcld | |- ( n e. NN -> ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) e. CC ) |
| 65 | 64 | sqcld | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) e. CC ) |
| 66 | 23 25 | rpmulcld | |- ( n e. NN -> ( 2 x. ( 2 x. n ) ) e. RR+ ) |
| 67 | 66 | sqrtgt0d | |- ( n e. NN -> 0 < ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ) |
| 68 | 67 | gt0ne0d | |- ( n e. NN -> ( sqrt ` ( 2 x. ( 2 x. n ) ) ) =/= 0 ) |
| 69 | 23 | rpne0d | |- ( n e. NN -> 2 =/= 0 ) |
| 70 | 9 10 69 28 | mulne0d | |- ( n e. NN -> ( 2 x. n ) =/= 0 ) |
| 71 | 11 15 70 18 | divne0d | |- ( n e. NN -> ( ( 2 x. n ) / _e ) =/= 0 ) |
| 72 | 2z | |- 2 e. ZZ |
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| 73 | 72 | a1i | |- ( n e. NN -> 2 e. ZZ ) |
| 74 | 73 30 | zmulcld | |- ( n e. NN -> ( 2 x. n ) e. ZZ ) |
| 75 | 62 71 74 | expne0d | |- ( n e. NN -> ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) =/= 0 ) |
| 76 | 61 63 68 75 | mulne0d | |- ( n e. NN -> ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) =/= 0 ) |
| 77 | 64 76 73 | expne0d | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) =/= 0 ) |
| 78 | 59 65 77 | divcan1d | |- ( n e. NN -> ( ( ( ( ! ` ( 2 x. n ) ) ^ 2 ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) = ( ( ! ` ( 2 x. n ) ) ^ 2 ) ) |
| 79 | 58 64 76 54 | expdivd | |- ( n e. NN -> ( ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ^ 2 ) = ( ( ( ! ` ( 2 x. n ) ) ^ 2 ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) ) |
| 80 | 79 | eqcomd | |- ( n e. NN -> ( ( ( ! ` ( 2 x. n ) ) ^ 2 ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) = ( ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ^ 2 ) ) |
| 81 | 80 | oveq1d | |- ( n e. NN -> ( ( ( ( ! ` ( 2 x. n ) ) ^ 2 ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) = ( ( ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ^ 2 ) x. ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) ) |
| 82 | 78 81 | eqtr3d | |- ( n e. NN -> ( ( ! ` ( 2 x. n ) ) ^ 2 ) = ( ( ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ^ 2 ) x. ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) ) |
| 83 | fveq2 | |- ( n = m -> ( ! ` n ) = ( ! ` m ) ) |
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| 84 | oveq2 | |- ( n = m -> ( 2 x. n ) = ( 2 x. m ) ) |
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| 85 | 84 | fveq2d | |- ( n = m -> ( sqrt ` ( 2 x. n ) ) = ( sqrt ` ( 2 x. m ) ) ) |
| 86 | oveq1 | |- ( n = m -> ( n / _e ) = ( m / _e ) ) |
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| 87 | id | |- ( n = m -> n = m ) |
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| 88 | 86 87 | oveq12d | |- ( n = m -> ( ( n / _e ) ^ n ) = ( ( m / _e ) ^ m ) ) |
| 89 | 85 88 | oveq12d | |- ( n = m -> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) = ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) |
| 90 | 83 89 | oveq12d | |- ( n = m -> ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) = ( ( ! ` m ) / ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ) |
| 91 | 90 | cbvmptv | |- ( n e. NN |-> ( ( ! ` n ) / ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) = ( m e. NN |-> ( ( ! ` m ) / ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ) |
| 92 | 1 91 | eqtri | |- A = ( m e. NN |-> ( ( ! ` m ) / ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ) |
| 93 | fveq2 | |- ( m = ( 2 x. n ) -> ( ! ` m ) = ( ! ` ( 2 x. n ) ) ) |
|
| 94 | oveq2 | |- ( m = ( 2 x. n ) -> ( 2 x. m ) = ( 2 x. ( 2 x. n ) ) ) |
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| 95 | 94 | fveq2d | |- ( m = ( 2 x. n ) -> ( sqrt ` ( 2 x. m ) ) = ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ) |
| 96 | oveq1 | |- ( m = ( 2 x. n ) -> ( m / _e ) = ( ( 2 x. n ) / _e ) ) |
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| 97 | id | |- ( m = ( 2 x. n ) -> m = ( 2 x. n ) ) |
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| 98 | 96 97 | oveq12d | |- ( m = ( 2 x. n ) -> ( ( m / _e ) ^ m ) = ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) |
| 99 | 95 98 | oveq12d | |- ( m = ( 2 x. n ) -> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) = ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) |
| 100 | 93 99 | oveq12d | |- ( m = ( 2 x. n ) -> ( ( ! ` m ) / ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) = ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ) |
| 101 | 2nn | |- 2 e. NN |
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| 102 | 101 | a1i | |- ( n e. NN -> 2 e. NN ) |
| 103 | id | |- ( n e. NN -> n e. NN ) |
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| 104 | 102 103 | nnmulcld | |- ( n e. NN -> ( 2 x. n ) e. NN ) |
| 105 | 58 64 76 | divcld | |- ( n e. NN -> ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) e. CC ) |
| 106 | 92 100 104 105 | fvmptd3 | |- ( n e. NN -> ( A ` ( 2 x. n ) ) = ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ) |
| 107 | 106 | oveq1d | |- ( n e. NN -> ( ( A ` ( 2 x. n ) ) ^ 2 ) = ( ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ^ 2 ) ) |
| 108 | 107 | eqcomd | |- ( n e. NN -> ( ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ^ 2 ) = ( ( A ` ( 2 x. n ) ) ^ 2 ) ) |
| 109 | 108 | oveq1d | |- ( n e. NN -> ( ( ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) ^ 2 ) x. ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) = ( ( ( A ` ( 2 x. n ) ) ^ 2 ) x. ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) ) |
| 110 | eqidd | |- ( n e. NN -> ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) = ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ) |
|
| 111 | 99 | adantl | |- ( ( n e. NN /\ m = ( 2 x. n ) ) -> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) = ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) |
| 112 | 110 111 104 64 | fvmptd | |- ( n e. NN -> ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) = ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) |
| 113 | 112 | oveq1d | |- ( n e. NN -> ( ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) ^ 2 ) = ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) |
| 114 | 113 | eqcomd | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) = ( ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) ^ 2 ) ) |
| 115 | 114 | oveq2d | |- ( n e. NN -> ( ( ( A ` ( 2 x. n ) ) ^ 2 ) x. ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) = ( ( ( A ` ( 2 x. n ) ) ^ 2 ) x. ( ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) ^ 2 ) ) ) |
| 116 | 82 109 115 | 3eqtrd | |- ( n e. NN -> ( ( ! ` ( 2 x. n ) ) ^ 2 ) = ( ( ( A ` ( 2 x. n ) ) ^ 2 ) x. ( ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) ^ 2 ) ) ) |
| 117 | 89 | cbvmptv | |- ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) = ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) |
| 118 | 117 | a1i | |- ( n e. NN -> ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) = ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ) |
| 119 | 118 | fveq1d | |- ( n e. NN -> ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) = ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) ) |
| 120 | 119 | eqcomd | |- ( n e. NN -> ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) = ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) ) |
| 121 | 120 | oveq1d | |- ( n e. NN -> ( ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) ^ 2 ) = ( ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) ^ 2 ) ) |
| 122 | 121 | oveq2d | |- ( n e. NN -> ( ( ( A ` ( 2 x. n ) ) ^ 2 ) x. ( ( ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ` ( 2 x. n ) ) ^ 2 ) ) = ( ( ( A ` ( 2 x. n ) ) ^ 2 ) x. ( ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) ^ 2 ) ) ) |
| 123 | 106 105 | eqeltrd | |- ( n e. NN -> ( A ` ( 2 x. n ) ) e. CC ) |
| 124 | 2 | fvmpt2 | |- ( ( n e. NN /\ ( A ` ( 2 x. n ) ) e. CC ) -> ( D ` n ) = ( A ` ( 2 x. n ) ) ) |
| 125 | 123 124 | mpdan | |- ( n e. NN -> ( D ` n ) = ( A ` ( 2 x. n ) ) ) |
| 126 | 125 | eqcomd | |- ( n e. NN -> ( A ` ( 2 x. n ) ) = ( D ` n ) ) |
| 127 | 126 | oveq1d | |- ( n e. NN -> ( ( A ` ( 2 x. n ) ) ^ 2 ) = ( ( D ` n ) ^ 2 ) ) |
| 128 | 3 | a1i | |- ( n e. NN -> E = ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ) |
| 129 | 128 | fveq1d | |- ( n e. NN -> ( E ` ( 2 x. n ) ) = ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) ) |
| 130 | 129 | eqcomd | |- ( n e. NN -> ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) = ( E ` ( 2 x. n ) ) ) |
| 131 | 130 | oveq1d | |- ( n e. NN -> ( ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) ^ 2 ) = ( ( E ` ( 2 x. n ) ) ^ 2 ) ) |
| 132 | 127 131 | oveq12d | |- ( n e. NN -> ( ( ( A ` ( 2 x. n ) ) ^ 2 ) x. ( ( ( n e. NN |-> ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ) ` ( 2 x. n ) ) ^ 2 ) ) = ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) |
| 133 | 116 122 132 | 3eqtrd | |- ( n e. NN -> ( ( ! ` ( 2 x. n ) ) ^ 2 ) = ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) |
| 134 | 52 133 | oveq12d | |- ( n e. NN -> ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ! ` n ) ^ 4 ) ) / ( ( ! ` ( 2 x. n ) ) ^ 2 ) ) = ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 135 | 134 | oveq1d | |- ( n e. NN -> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ! ` n ) ^ 4 ) ) / ( ( ! ` ( 2 x. n ) ) ^ 2 ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) |
| 136 | 135 | mpteq2ia | |- ( n e. NN |-> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ! ` n ) ^ 4 ) ) / ( ( ! ` ( 2 x. n ) ) ^ 2 ) ) / ( ( 2 x. n ) + 1 ) ) ) = ( n e. NN |-> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) |
| 137 | 42 5 | nn0mulcld | |- ( n e. NN -> ( 4 x. n ) e. NN0 ) |
| 138 | 9 137 | expcld | |- ( n e. NN -> ( 2 ^ ( 4 x. n ) ) e. CC ) |
| 139 | 50 45 | eqeltrd | |- ( n e. NN -> ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) e. CC ) |
| 140 | 138 139 | mulcomd | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) = ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) x. ( 2 ^ ( 4 x. n ) ) ) ) |
| 141 | 140 | oveq1d | |- ( n e. NN -> ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) x. ( 2 ^ ( 4 x. n ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 142 | 141 | oveq1d | |- ( n e. NN -> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) x. ( 2 ^ ( 4 x. n ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) |
| 143 | 125 123 | eqeltrd | |- ( n e. NN -> ( D ` n ) e. CC ) |
| 144 | 143 | sqcld | |- ( n e. NN -> ( ( D ` n ) ^ 2 ) e. CC ) |
| 145 | 128 118 | eqtrd | |- ( n e. NN -> E = ( m e. NN |-> ( ( sqrt ` ( 2 x. m ) ) x. ( ( m / _e ) ^ m ) ) ) ) |
| 146 | 145 111 104 64 | fvmptd | |- ( n e. NN -> ( E ` ( 2 x. n ) ) = ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) |
| 147 | 146 64 | eqeltrd | |- ( n e. NN -> ( E ` ( 2 x. n ) ) e. CC ) |
| 148 | 147 | sqcld | |- ( n e. NN -> ( ( E ` ( 2 x. n ) ) ^ 2 ) e. CC ) |
| 149 | nnne0 | |- ( ( ! ` ( 2 x. n ) ) e. NN -> ( ! ` ( 2 x. n ) ) =/= 0 ) |
|
| 150 | 55 56 149 | 3syl | |- ( n e. NN -> ( ! ` ( 2 x. n ) ) =/= 0 ) |
| 151 | 58 64 150 76 | divne0d | |- ( n e. NN -> ( ( ! ` ( 2 x. n ) ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ) =/= 0 ) |
| 152 | 106 151 | eqnetrd | |- ( n e. NN -> ( A ` ( 2 x. n ) ) =/= 0 ) |
| 153 | 125 152 | eqnetrd | |- ( n e. NN -> ( D ` n ) =/= 0 ) |
| 154 | 143 153 73 | expne0d | |- ( n e. NN -> ( ( D ` n ) ^ 2 ) =/= 0 ) |
| 155 | 146 76 | eqnetrd | |- ( n e. NN -> ( E ` ( 2 x. n ) ) =/= 0 ) |
| 156 | 147 155 73 | expne0d | |- ( n e. NN -> ( ( E ` ( 2 x. n ) ) ^ 2 ) =/= 0 ) |
| 157 | 139 144 138 148 154 156 | divmuldivd | |- ( n e. NN -> ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) / ( ( D ` n ) ^ 2 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) x. ( 2 ^ ( 4 x. n ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 158 | 157 | eqcomd | |- ( n e. NN -> ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) x. ( 2 ^ ( 4 x. n ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) / ( ( D ` n ) ^ 2 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 159 | 158 | oveq1d | |- ( n e. NN -> ( ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) x. ( 2 ^ ( 4 x. n ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) / ( ( D ` n ) ^ 2 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) |
| 160 | 35 33 | eqeltrd | |- ( n e. NN -> ( A ` n ) e. CC ) |
| 161 | 160 42 | expcld | |- ( n e. NN -> ( ( A ` n ) ^ 4 ) e. CC ) |
| 162 | 39 46 | eqeltrd | |- ( n e. NN -> ( ( E ` n ) ^ 4 ) e. CC ) |
| 163 | 161 162 144 154 | div23d | |- ( n e. NN -> ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) / ( ( D ` n ) ^ 2 ) ) = ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( E ` n ) ^ 4 ) ) ) |
| 164 | 163 | oveq1d | |- ( n e. NN -> ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) / ( ( D ` n ) ^ 2 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( E ` n ) ^ 4 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 165 | 164 | oveq1d | |- ( n e. NN -> ( ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) / ( ( D ` n ) ^ 2 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( E ` n ) ^ 4 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) |
| 166 | 161 144 154 | divcld | |- ( n e. NN -> ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) e. CC ) |
| 167 | 138 148 156 | divcld | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) e. CC ) |
| 168 | 166 162 167 | mulassd | |- ( n e. NN -> ( ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( E ` n ) ^ 4 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) ) |
| 169 | 168 | oveq1d | |- ( n e. NN -> ( ( ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( E ` n ) ^ 4 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) / ( ( 2 x. n ) + 1 ) ) ) |
| 170 | 162 167 | mulcld | |- ( n e. NN -> ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) e. CC ) |
| 171 | 1cnd | |- ( n e. NN -> 1 e. CC ) |
|
| 172 | 11 171 | addcld | |- ( n e. NN -> ( ( 2 x. n ) + 1 ) e. CC ) |
| 173 | 0red | |- ( n e. NN -> 0 e. RR ) |
|
| 174 | 104 | nnred | |- ( n e. NN -> ( 2 x. n ) e. RR ) |
| 175 | 2re | |- 2 e. RR |
|
| 176 | 175 | a1i | |- ( n e. NN -> 2 e. RR ) |
| 177 | nnre | |- ( n e. NN -> n e. RR ) |
|
| 178 | 176 177 | remulcld | |- ( n e. NN -> ( 2 x. n ) e. RR ) |
| 179 | 1red | |- ( n e. NN -> 1 e. RR ) |
|
| 180 | 178 179 | readdcld | |- ( n e. NN -> ( ( 2 x. n ) + 1 ) e. RR ) |
| 181 | 104 | nngt0d | |- ( n e. NN -> 0 < ( 2 x. n ) ) |
| 182 | 174 | ltp1d | |- ( n e. NN -> ( 2 x. n ) < ( ( 2 x. n ) + 1 ) ) |
| 183 | 173 174 180 181 182 | lttrd | |- ( n e. NN -> 0 < ( ( 2 x. n ) + 1 ) ) |
| 184 | 183 | gt0ne0d | |- ( n e. NN -> ( ( 2 x. n ) + 1 ) =/= 0 ) |
| 185 | 166 170 172 184 | divassd | |- ( n e. NN -> ( ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) ) |
| 186 | 162 138 148 156 | div12d | |- ( n e. NN -> ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( E ` n ) ^ 4 ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 187 | 12 20 42 | mulexpd | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) = ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) x. ( ( ( n / _e ) ^ n ) ^ 4 ) ) ) |
| 188 | 61 63 | sqmuld | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) = ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) x. ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) |
| 189 | 187 188 | oveq12d | |- ( n e. NN -> ( ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) = ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) x. ( ( ( n / _e ) ^ n ) ^ 4 ) ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) x. ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 190 | 146 | oveq1d | |- ( n e. NN -> ( ( E ` ( 2 x. n ) ) ^ 2 ) = ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) |
| 191 | 39 190 | oveq12d | |- ( n e. NN -> ( ( ( E ` n ) ^ 4 ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) = ( ( ( ( sqrt ` ( 2 x. n ) ) x. ( ( n / _e ) ^ n ) ) ^ 4 ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) x. ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ) ^ 2 ) ) ) |
| 192 | 12 42 | expcld | |- ( n e. NN -> ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) e. CC ) |
| 193 | 61 | sqcld | |- ( n e. NN -> ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) e. CC ) |
| 194 | 20 42 | expcld | |- ( n e. NN -> ( ( ( n / _e ) ^ n ) ^ 4 ) e. CC ) |
| 195 | 63 | sqcld | |- ( n e. NN -> ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) e. CC ) |
| 196 | 61 68 73 | expne0d | |- ( n e. NN -> ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) =/= 0 ) |
| 197 | 63 75 73 | expne0d | |- ( n e. NN -> ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) =/= 0 ) |
| 198 | 192 193 194 195 196 197 | divmuldivd | |- ( n e. NN -> ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) = ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) x. ( ( ( n / _e ) ^ n ) ^ 4 ) ) / ( ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) x. ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 199 | 189 191 198 | 3eqtr4d | |- ( n e. NN -> ( ( ( E ` n ) ^ 4 ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) = ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) ) |
| 200 | 199 | oveq2d | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( E ` n ) ^ 4 ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) ) ) |
| 201 | 66 | rprege0d | |- ( n e. NN -> ( ( 2 x. ( 2 x. n ) ) e. RR /\ 0 <_ ( 2 x. ( 2 x. n ) ) ) ) |
| 202 | resqrtth | |- ( ( ( 2 x. ( 2 x. n ) ) e. RR /\ 0 <_ ( 2 x. ( 2 x. n ) ) ) -> ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) = ( 2 x. ( 2 x. n ) ) ) |
|
| 203 | 201 202 | syl | |- ( n e. NN -> ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) = ( 2 x. ( 2 x. n ) ) ) |
| 204 | 203 | oveq2d | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) = ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( 2 x. ( 2 x. n ) ) ) ) |
| 205 | 2t2e4 | |- ( 2 x. 2 ) = 4 |
|
| 206 | 205 | eqcomi | |- 4 = ( 2 x. 2 ) |
| 207 | 206 | a1i | |- ( n e. NN -> 4 = ( 2 x. 2 ) ) |
| 208 | 207 | oveq2d | |- ( n e. NN -> ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) = ( ( sqrt ` ( 2 x. n ) ) ^ ( 2 x. 2 ) ) ) |
| 209 | 12 54 54 | expmuld | |- ( n e. NN -> ( ( sqrt ` ( 2 x. n ) ) ^ ( 2 x. 2 ) ) = ( ( ( sqrt ` ( 2 x. n ) ) ^ 2 ) ^ 2 ) ) |
| 210 | 25 | rprege0d | |- ( n e. NN -> ( ( 2 x. n ) e. RR /\ 0 <_ ( 2 x. n ) ) ) |
| 211 | resqrtth | |- ( ( ( 2 x. n ) e. RR /\ 0 <_ ( 2 x. n ) ) -> ( ( sqrt ` ( 2 x. n ) ) ^ 2 ) = ( 2 x. n ) ) |
|
| 212 | 210 211 | syl | |- ( n e. NN -> ( ( sqrt ` ( 2 x. n ) ) ^ 2 ) = ( 2 x. n ) ) |
| 213 | 212 | oveq1d | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. n ) ) ^ 2 ) ^ 2 ) = ( ( 2 x. n ) ^ 2 ) ) |
| 214 | 208 209 213 | 3eqtrd | |- ( n e. NN -> ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) = ( ( 2 x. n ) ^ 2 ) ) |
| 215 | 9 9 10 | mulassd | |- ( n e. NN -> ( ( 2 x. 2 ) x. n ) = ( 2 x. ( 2 x. n ) ) ) |
| 216 | 205 | a1i | |- ( n e. NN -> ( 2 x. 2 ) = 4 ) |
| 217 | 216 | oveq1d | |- ( n e. NN -> ( ( 2 x. 2 ) x. n ) = ( 4 x. n ) ) |
| 218 | 215 217 | eqtr3d | |- ( n e. NN -> ( 2 x. ( 2 x. n ) ) = ( 4 x. n ) ) |
| 219 | 214 218 | oveq12d | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( 2 x. ( 2 x. n ) ) ) = ( ( ( 2 x. n ) ^ 2 ) / ( 4 x. n ) ) ) |
| 220 | 9 10 | sqmuld | |- ( n e. NN -> ( ( 2 x. n ) ^ 2 ) = ( ( 2 ^ 2 ) x. ( n ^ 2 ) ) ) |
| 221 | sq2 | |- ( 2 ^ 2 ) = 4 |
|
| 222 | 221 | a1i | |- ( n e. NN -> ( 2 ^ 2 ) = 4 ) |
| 223 | 222 | oveq1d | |- ( n e. NN -> ( ( 2 ^ 2 ) x. ( n ^ 2 ) ) = ( 4 x. ( n ^ 2 ) ) ) |
| 224 | 220 223 | eqtrd | |- ( n e. NN -> ( ( 2 x. n ) ^ 2 ) = ( 4 x. ( n ^ 2 ) ) ) |
| 225 | 224 | oveq1d | |- ( n e. NN -> ( ( ( 2 x. n ) ^ 2 ) / ( 4 x. n ) ) = ( ( 4 x. ( n ^ 2 ) ) / ( 4 x. n ) ) ) |
| 226 | 4cn | |- 4 e. CC |
|
| 227 | 4ne0 | |- 4 =/= 0 |
|
| 228 | 226 227 | dividi | |- ( 4 / 4 ) = 1 |
| 229 | 228 | a1i | |- ( n e. NN -> ( 4 / 4 ) = 1 ) |
| 230 | 10 | sqvald | |- ( n e. NN -> ( n ^ 2 ) = ( n x. n ) ) |
| 231 | 230 | oveq1d | |- ( n e. NN -> ( ( n ^ 2 ) / n ) = ( ( n x. n ) / n ) ) |
| 232 | 10 10 28 | divcan4d | |- ( n e. NN -> ( ( n x. n ) / n ) = n ) |
| 233 | 231 232 | eqtrd | |- ( n e. NN -> ( ( n ^ 2 ) / n ) = n ) |
| 234 | 229 233 | oveq12d | |- ( n e. NN -> ( ( 4 / 4 ) x. ( ( n ^ 2 ) / n ) ) = ( 1 x. n ) ) |
| 235 | 42 | nn0cnd | |- ( n e. NN -> 4 e. CC ) |
| 236 | 10 | sqcld | |- ( n e. NN -> ( n ^ 2 ) e. CC ) |
| 237 | 227 | a1i | |- ( n e. NN -> 4 =/= 0 ) |
| 238 | 235 235 236 10 237 28 | divmuldivd | |- ( n e. NN -> ( ( 4 / 4 ) x. ( ( n ^ 2 ) / n ) ) = ( ( 4 x. ( n ^ 2 ) ) / ( 4 x. n ) ) ) |
| 239 | 10 | mullidd | |- ( n e. NN -> ( 1 x. n ) = n ) |
| 240 | 234 238 239 | 3eqtr3d | |- ( n e. NN -> ( ( 4 x. ( n ^ 2 ) ) / ( 4 x. n ) ) = n ) |
| 241 | 225 240 | eqtrd | |- ( n e. NN -> ( ( ( 2 x. n ) ^ 2 ) / ( 4 x. n ) ) = n ) |
| 242 | 204 219 241 | 3eqtrd | |- ( n e. NN -> ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) = n ) |
| 243 | 10 235 | mulcomd | |- ( n e. NN -> ( n x. 4 ) = ( 4 x. n ) ) |
| 244 | 243 | oveq2d | |- ( n e. NN -> ( ( n / _e ) ^ ( n x. 4 ) ) = ( ( n / _e ) ^ ( 4 x. n ) ) ) |
| 245 | 19 42 5 | expmuld | |- ( n e. NN -> ( ( n / _e ) ^ ( n x. 4 ) ) = ( ( ( n / _e ) ^ n ) ^ 4 ) ) |
| 246 | 10 15 18 137 | expdivd | |- ( n e. NN -> ( ( n / _e ) ^ ( 4 x. n ) ) = ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) ) |
| 247 | 244 245 246 | 3eqtr3d | |- ( n e. NN -> ( ( ( n / _e ) ^ n ) ^ 4 ) = ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) ) |
| 248 | 9 10 9 | mul32d | |- ( n e. NN -> ( ( 2 x. n ) x. 2 ) = ( ( 2 x. 2 ) x. n ) ) |
| 249 | 248 217 | eqtrd | |- ( n e. NN -> ( ( 2 x. n ) x. 2 ) = ( 4 x. n ) ) |
| 250 | 249 | oveq2d | |- ( n e. NN -> ( ( ( 2 x. n ) / _e ) ^ ( ( 2 x. n ) x. 2 ) ) = ( ( ( 2 x. n ) / _e ) ^ ( 4 x. n ) ) ) |
| 251 | 62 54 55 | expmuld | |- ( n e. NN -> ( ( ( 2 x. n ) / _e ) ^ ( ( 2 x. n ) x. 2 ) ) = ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) |
| 252 | 11 15 18 137 | expdivd | |- ( n e. NN -> ( ( ( 2 x. n ) / _e ) ^ ( 4 x. n ) ) = ( ( ( 2 x. n ) ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) ) |
| 253 | 250 251 252 | 3eqtr3d | |- ( n e. NN -> ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) = ( ( ( 2 x. n ) ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) ) |
| 254 | 247 253 | oveq12d | |- ( n e. NN -> ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) = ( ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) / ( ( ( 2 x. n ) ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) ) ) |
| 255 | 247 194 | eqeltrrd | |- ( n e. NN -> ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) e. CC ) |
| 256 | 11 137 | expcld | |- ( n e. NN -> ( ( 2 x. n ) ^ ( 4 x. n ) ) e. CC ) |
| 257 | 15 137 | expcld | |- ( n e. NN -> ( _e ^ ( 4 x. n ) ) e. CC ) |
| 258 | 47 30 | zmulcld | |- ( n e. NN -> ( 4 x. n ) e. ZZ ) |
| 259 | 11 70 258 | expne0d | |- ( n e. NN -> ( ( 2 x. n ) ^ ( 4 x. n ) ) =/= 0 ) |
| 260 | 15 18 258 | expne0d | |- ( n e. NN -> ( _e ^ ( 4 x. n ) ) =/= 0 ) |
| 261 | 255 256 257 259 260 | divdiv2d | |- ( n e. NN -> ( ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) / ( ( ( 2 x. n ) ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) ) = ( ( ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) x. ( _e ^ ( 4 x. n ) ) ) / ( ( 2 x. n ) ^ ( 4 x. n ) ) ) ) |
| 262 | 10 137 | expcld | |- ( n e. NN -> ( n ^ ( 4 x. n ) ) e. CC ) |
| 263 | 262 257 260 | divcan1d | |- ( n e. NN -> ( ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) x. ( _e ^ ( 4 x. n ) ) ) = ( n ^ ( 4 x. n ) ) ) |
| 264 | 263 | oveq1d | |- ( n e. NN -> ( ( ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) x. ( _e ^ ( 4 x. n ) ) ) / ( ( 2 x. n ) ^ ( 4 x. n ) ) ) = ( ( n ^ ( 4 x. n ) ) / ( ( 2 x. n ) ^ ( 4 x. n ) ) ) ) |
| 265 | 9 10 137 | mulexpd | |- ( n e. NN -> ( ( 2 x. n ) ^ ( 4 x. n ) ) = ( ( 2 ^ ( 4 x. n ) ) x. ( n ^ ( 4 x. n ) ) ) ) |
| 266 | 265 | oveq2d | |- ( n e. NN -> ( ( n ^ ( 4 x. n ) ) / ( ( 2 x. n ) ^ ( 4 x. n ) ) ) = ( ( n ^ ( 4 x. n ) ) / ( ( 2 ^ ( 4 x. n ) ) x. ( n ^ ( 4 x. n ) ) ) ) ) |
| 267 | 138 262 | mulcomd | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( n ^ ( 4 x. n ) ) ) = ( ( n ^ ( 4 x. n ) ) x. ( 2 ^ ( 4 x. n ) ) ) ) |
| 268 | 267 | oveq2d | |- ( n e. NN -> ( ( n ^ ( 4 x. n ) ) / ( ( 2 ^ ( 4 x. n ) ) x. ( n ^ ( 4 x. n ) ) ) ) = ( ( n ^ ( 4 x. n ) ) / ( ( n ^ ( 4 x. n ) ) x. ( 2 ^ ( 4 x. n ) ) ) ) ) |
| 269 | 10 28 258 | expne0d | |- ( n e. NN -> ( n ^ ( 4 x. n ) ) =/= 0 ) |
| 270 | 9 69 258 | expne0d | |- ( n e. NN -> ( 2 ^ ( 4 x. n ) ) =/= 0 ) |
| 271 | 262 262 138 269 270 | divdiv1d | |- ( n e. NN -> ( ( ( n ^ ( 4 x. n ) ) / ( n ^ ( 4 x. n ) ) ) / ( 2 ^ ( 4 x. n ) ) ) = ( ( n ^ ( 4 x. n ) ) / ( ( n ^ ( 4 x. n ) ) x. ( 2 ^ ( 4 x. n ) ) ) ) ) |
| 272 | 262 269 | dividd | |- ( n e. NN -> ( ( n ^ ( 4 x. n ) ) / ( n ^ ( 4 x. n ) ) ) = 1 ) |
| 273 | 272 | oveq1d | |- ( n e. NN -> ( ( ( n ^ ( 4 x. n ) ) / ( n ^ ( 4 x. n ) ) ) / ( 2 ^ ( 4 x. n ) ) ) = ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) |
| 274 | 268 271 273 | 3eqtr2d | |- ( n e. NN -> ( ( n ^ ( 4 x. n ) ) / ( ( 2 ^ ( 4 x. n ) ) x. ( n ^ ( 4 x. n ) ) ) ) = ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) |
| 275 | 264 266 274 | 3eqtrd | |- ( n e. NN -> ( ( ( ( n ^ ( 4 x. n ) ) / ( _e ^ ( 4 x. n ) ) ) x. ( _e ^ ( 4 x. n ) ) ) / ( ( 2 x. n ) ^ ( 4 x. n ) ) ) = ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) |
| 276 | 254 261 275 | 3eqtrd | |- ( n e. NN -> ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) = ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) |
| 277 | 242 276 | oveq12d | |- ( n e. NN -> ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) = ( n x. ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) ) |
| 278 | 277 | oveq2d | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) ) = ( ( 2 ^ ( 4 x. n ) ) x. ( n x. ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) ) ) |
| 279 | 138 270 | reccld | |- ( n e. NN -> ( 1 / ( 2 ^ ( 4 x. n ) ) ) e. CC ) |
| 280 | 138 10 279 | mul12d | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( n x. ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) ) = ( n x. ( ( 2 ^ ( 4 x. n ) ) x. ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) ) ) |
| 281 | 10 | mulridd | |- ( n e. NN -> ( n x. 1 ) = n ) |
| 282 | 138 270 | recidd | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) = 1 ) |
| 283 | 282 | oveq2d | |- ( n e. NN -> ( n x. ( ( 2 ^ ( 4 x. n ) ) x. ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) ) = ( n x. 1 ) ) |
| 284 | 281 283 233 | 3eqtr4d | |- ( n e. NN -> ( n x. ( ( 2 ^ ( 4 x. n ) ) x. ( 1 / ( 2 ^ ( 4 x. n ) ) ) ) ) = ( ( n ^ 2 ) / n ) ) |
| 285 | 278 280 284 | 3eqtrd | |- ( n e. NN -> ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( ( sqrt ` ( 2 x. n ) ) ^ 4 ) / ( ( sqrt ` ( 2 x. ( 2 x. n ) ) ) ^ 2 ) ) x. ( ( ( ( n / _e ) ^ n ) ^ 4 ) / ( ( ( ( 2 x. n ) / _e ) ^ ( 2 x. n ) ) ^ 2 ) ) ) ) = ( ( n ^ 2 ) / n ) ) |
| 286 | 186 200 285 | 3eqtrd | |- ( n e. NN -> ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) = ( ( n ^ 2 ) / n ) ) |
| 287 | 286 | oveq1d | |- ( n e. NN -> ( ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( n ^ 2 ) / n ) / ( ( 2 x. n ) + 1 ) ) ) |
| 288 | 236 10 172 28 184 | divdiv1d | |- ( n e. NN -> ( ( ( n ^ 2 ) / n ) / ( ( 2 x. n ) + 1 ) ) = ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) |
| 289 | 287 288 | eqtrd | |- ( n e. NN -> ( ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) |
| 290 | 289 | oveq2d | |- ( n e. NN -> ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) = ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) ) |
| 291 | 185 290 | eqtrd | |- ( n e. NN -> ( ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( ( E ` n ) ^ 4 ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) ) |
| 292 | 165 169 291 | 3eqtrd | |- ( n e. NN -> ( ( ( ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) / ( ( D ` n ) ^ 2 ) ) x. ( ( 2 ^ ( 4 x. n ) ) / ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) ) |
| 293 | 142 159 292 | 3eqtrd | |- ( n e. NN -> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) = ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) ) |
| 294 | 293 | mpteq2ia | |- ( n e. NN |-> ( ( ( ( 2 ^ ( 4 x. n ) ) x. ( ( ( A ` n ) ^ 4 ) x. ( ( E ` n ) ^ 4 ) ) ) / ( ( ( D ` n ) ^ 2 ) x. ( ( E ` ( 2 x. n ) ) ^ 2 ) ) ) / ( ( 2 x. n ) + 1 ) ) ) = ( n e. NN |-> ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) ) |
| 295 | 4 136 294 | 3eqtri | |- V = ( n e. NN |-> ( ( ( ( A ` n ) ^ 4 ) / ( ( D ` n ) ^ 2 ) ) x. ( ( n ^ 2 ) / ( n x. ( ( 2 x. n ) + 1 ) ) ) ) ) |